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NFL: 2 players violated concussion protocol

Two players violated league concussion protocol in last weekend's wild-card games, according to a letter sent by the NFL's head, neck and spine committee chairmen to all team doctors and trainers.

In a document obtained by The Associated Press, Dr. Hunt Batjer and Dr. Richard Ellenbogen say that one player actually re-entered the game and another refused to leave the sideline. The doctors did not identify the players, but Green Bay tackle David Bakhtiari returned to his game for an extra-point try despite being examined for a concussion.

Saints cornerback Keenan Lewis remained on the sideline but did not get back on the field.

The doctors "emphasize that we find no fault in how the team medical staffs conducted themselves last weekend."